Fixed a bug in organisation admin permission check

src/ServicesProvider/ServicesProvider.php

@@ -103,7 +103,7 @@ class ServicesProvider
              * @return bool true if $user is an administrator of $organisation.
              */
             $authorizer->addCallback('is_organisation_admin', function ($user_id, $organisation_id) {
-                return Capsule::table('organisation_members')
+                $query = Capsule::table('organisation_members')
                     ->where('user_id', $user_id)
                     ->where('organisation_id', $organisation_id)
                     ->where('flag_admin', true);